- 産業: Astronomy
- Number of terms: 6727
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Planetary Science Research Discoveries (PSRD) is an educational site sharing the latest research by NASA-sponsored scientists on meteorites, asteroids, planets, moons, and other materials in our Solar System. The website is supported by the Cosmochemistry Program of NASA's Science Mission ...
The region of "altered space" that will interact with the magnetic properties of a magnet. It is located mainly between the opposite poles of a magnet or in the energetic space about an electric charge in motion.
Industry:Astronomy
An instrument carried to Jupiter on the Galileo planetary spacecraft, imaging in regions of the energy spectrum that humans cannot see. NIMS website at the Jet Propulsion Laboratory.
Industry:Astronomy
An element with atomic number 6; symbol: C. Graphite is a low-pressure form of carbon. Diamond is a high-pressure form of carbon. (Carbon is one of the four elements essential for life. The others are hydrogen, oxygen, and nitrogen. )
Industry:Astronomy
The process by which plants convert water and carbon dioxide into carbohydrates, using sunlight as the source of energy and the aid of chlorophyll.
Industry:Astronomy
The mean Earth-Sun distance, equal to 149. 5 million kilometers or 93 million miles.
Industry:Astronomy
Astronomical brightness measured on a logarithmic scale, based on the ancient practice of noting that the brightest stars in the sky were of "first importance" or "first magnitude", the next brightest being "second magnitude" etc. The human eye is a logarithmic detector, and in 1854 Pogson formalized this scale and defined a difference of 5 magnitudes to be exactly a factor of 100 in brightness. The scale is calibrated to the bright star Vega which is defined to have a magnitude of 0. For reference, the faintest naked-eye magnitude visible from a dark site is +6. Comet C/1996 B2 Hyakutake reached magnitude 0 in late March 1996.
Industry:Astronomy
Geochemical and physical processes that result in the sequential formation and separation of minerals from a melt. The residual magma changes in composition and becomes enriched in incompatible elements.
Industry:Astronomy
Common mineral; ranges from NaAlSi<sub>3</sub> O<sub>8</sub> (albite) to CaAl<sub>2</sub> Si<sub>2</sub> O<sub>8</sub> (anorthite).
Industry:Astronomy
A deviation from the common rule, type, or form; something abnormal or inconsistent.
Industry:Astronomy
The material between the stars, consisting of gas, dust and cosmic rays (high energy charged particles, moving at nearly the speed of light).
Industry:Astronomy
